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A. BOSSHAR-DT.

PENCIL SHARPENER. APPLICATION FILED JUNE 16. 1914.

Patented Aug. 1, 1916.

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ANDREVT BGSSHARDT, OF '75 R EIQNSYLVANIB.

Application filed Eune 16, 191.4%.

To In whom it may concern Be it known that I, Anonnw nossrmnn'r, acitizen of the United States, residing at York, in the county of York,Sta to of Pennsvlvania, have invented certa'n new and useful.1mpi-(wenients in PenciLSharpeners, and i do hereby declare thefollowing to ho a full clear, and exact description of the inventioinsuch as will enable others skillet in the art to which it appertains tomake and use the Jame.

This invention relates to a pencil sharpeuer.

Mn object of the invention is to provide a very simple and smallsharpener which may be attached to a pencil and left thereon in suchposition that it may be readily brought into use.

A further objcct of the invention is to provide means for clamping thedevice on the pencil.

A still further object of the invention isto provide means for releasingthe clamp, the further movement of which will apply the cutting knives.

lVith these and other objects in view such as will appear as thedescription progresses, my invention comprises the combination andarrangement of parts as herein set forth and subsequently claimed.

Referring to the drawing: Figure 1 is a side elevation of device on apencil in inoperative position. Fig. 2 is a similar view showing thesame in operative position. 3 is a section on line 38 of Fig. 1. Fig. lis a detail with parts broken away showing the frame of the clampingfingers.

Referring to the drawing wherein like parts are indicated by likecharacters tlirouglmut the several views: My device comprises an annularcasing having a vertical front wall 2 with a circular hole 3 formedtherein. A tubular portion 4- extends rearwardly from this hole andspaced from this portion a and formed integrally with the periphery ofthe plate 2 is an annular plate 5. Rotatably mounted between the plate 5and the tubular member 4c is a collar 6 having a cam face 7 on itsforward end and an operating shank 8 on the rear end thereof whichextends beyond the rear end of the plate 5 and is cut-away on its lowerface, as at 9. On the rear end of this tubular member 4 is formedfingers 10 on which are located wedges 11 which fit into the cut-awayportion 9 ofthe mem- Spccification of Letters Patent.

- 15 have longitudinally extending c .t 21g elges 17 so that when thedevice is rotated Serial 1T0. 84.51%8.

her 6. An outwardly projecting portion 12 is formed on this collar 6 anda pin 13 pro- ]ects trom this portion and extends throu h an egee slot1%. Pivotally secured between the plate o and the tubular member a are aplurality oi knives 15 having rearwardly extending arms 16 which nor camrace of the member 5. Tlhese and the knives are in contact with thepoint of a pencil the same will be sharpened.

lrssuming that the device is in place on a At this time the pin 13 is inthe rearmost portion of the slot 14:. The binding action between themc1nher 6 and the wedges 11 is due to the fact that as the fingers 10are resilicnt and the plate 5 is rigid, the riding up of tie wedges onthe cut-away portion 9 of the member 6 pushes the said fingers intoengagement with the pencil.

hen it is desired to sharpen the point of the pencil it is onlynecessary to grip the operating shank 8 of the member 6 and turn thesame slightly, which causes the pin 13 to ride in the slot Ll and thusrelieve the pressure between the wedges 11 and the cutaway portion 9 ofthe member 6, the entire device may then be moved to the end of thepencil, at which time the member 6 is turned farther and as it is turnedthe engagement of the pin 13 with the slot 14 causes the said member (3to be drawn forwardly and the projections 11' to ride up on the cam face7 so that the knives 15 will be thrown downwardly at an angle and thecutting edges thereof will contact with the portion of the pencil to besharpened. The plate 5 is then gripped and rotated in the oppositedirection to that in which the member 6 is rotated, which causes theknife edges 17 of the knives 15 to cut the material of the pencil andthus sharpen the same. After the pencil has been sharpened the operationmay be reversed and the device clamoed up on the upper end of the pencilout 01. the way but ready and convenient for the next operation.

From the foregoing description it may be seen that I have provided avery simple but small pencil sharpener which may be readily attached toa pencil and kept thereon, while the same is being used'so that it willbe in a convenient position for use and will thus save a great deal oftime in sharpening a pencil.

It is obvious that the number of knives ranged to engage a pencil, meanson said body portion to clamp the same to the pencil, knives pivotallymounted on the body portion, said clamping means being construeted andarranged to move the knives to operative positions when operated torelease the pencil. V V

2. In combination, a body portion constructed and arranged to engage apencil, knives pivoted to said body portion, means 011 said body portionto grip the pencil and means to actuate said gripping means and on thereverse movement to move the knives to operative positions.

3. In combination, a body portion of annular formation and having atubular mem ber extending therethrough, said tubular member havingresilient fingers on the rear end thereof, wedges on the resilientfingers, a collar mounted in the body portion and having a cam face onits forward end, knives pivotally mounted in the body portion havingextensions engaging the cam face, means for causing the collar to movethe knives to operative positions when movedin one direction, and toactuate the resilient fingers to grip the fingers when moved in theother direction.

4. In combination, an annular body portion adapted toreceive a pencil,knives pivoted thereto, means rotatably mounted in said body portion tothrow the knives into operative position, said means maintaining theknives in such position during the reverse movement of the body portionin one r direction to cut the point of a pencil.

In testimony whereof, I ailix my signature, in the presence of twowltnesses.

ANDREIV BOSSIIARDT.

Witnesses:

MILO GLAssIcK, Pnanns E. Gross.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

